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Grid-connected topology of PMSG wind power system based on VSC-HVDC

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4 Author(s)
Kun Zhao ; State Key Lab. of Alternate Electr. Power Syst., North China Electr. Power Univ., Beijing, China ; Gengyin Li ; Bozhong Wang ; Ming Zhou

As the wind power generation technique is improved greatly, permanent magnet synchronous generator (PMSG) is paid more and more attention because of its multiple advantages. Nevertheless, conventional directly-drive PMSG wind generation system is connected to the grid by AC transmission. This paper introduces the DC connection structure of wind farm based on PMSG. According to VSC-HVDC (Voltage Source Converter based HVDC) transmission, the topology of series-parallel DC generation units is proposed. Regarding to the control strategy of the power generation and transmission system mentioned above, the DC voltage is controlled on generator-side for achieving the purpose of seriesparallel, and on grid-side active and reactive power decoupling method is applied to track maximum wind power by controlling the d-axis and q-axis current of the grid. The models of singlegenerator, series connection and parallel connection system are established on the PSCAD/EMTDC platform. Simulation results prove the validity of the topology scheme and the corresponding control strategy.

Published in:

Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011 4th International Conference on

Date of Conference:

6-9 July 2011